docs(d1): add D1 Migration Guard to community projects

[MattBridges]

Summary

Adds d1-migration-guard to the D1 community projects reference page, alongside the other community CLI tools (e.g. d1-console).

d1-migration-guard is a free, MIT-licensed, zero-dependency CLI that checks D1 migrations for three common footguns before you run wrangler d1 migrations apply:

• Migration filename ordering / duplicate or gapped numeric prefixes
• Missing or placeholder database_id in wrangler.toml
• Destructive SQL patterns (DROP TABLE, DROP COLUMN, unfiltered DELETE)

It reads local files only — it never calls wrangler and never touches a live database.

Repo: https://github.com/MattBridges/d1-migration-guard

Disclosure

I'm the author of this tool. Following the existing entries' format (short factual description + GitHub link, no marketing copy).

[cloudflare-docs-bot]

Review

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